单项选择题


A．in which
B．at which
C．of which
D．under which
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单项选择题
A．improper toB．incapable ofC．unsuitable toD．incompetent of
A．improper to
B．incapable of
C．unsuitable to
D．incompetent of
单项选择题
A．whatB．asC．thatD．which
A．what
B．as
C．that
D．which
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